Database Definition .- A set of auxiliary information stored in memory, which allows direct access and a set of programs that manipulate data in a database is non-redundant set of structured data organized independently of its use and application in real time machine accessible and compatible with concurrent users with different information and need not preach to time. Explain their origins and background emerged since the mid-sixties history of databases in 1970 Codd proposed the relational model, this model is the one that has marked the line of research for many years, are now object-oriented models
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